#!/usr/bin/env python3

import rospy

if __name__ == '__main__':
    rospy.init_node('param_get_p')
    key = rospy.search_param('radius')
    rospy.loginfo('key = %s', key)
    if key is not None:
        radius = rospy.get_param('radius')
        rospy.loginfo('radius = %.2f', radius)
